Home / 388,845,547,911.16-536,595,206,745.75-215,237,803,471.90

Finding the Fourth Proportional to 388,845,547,911.16, 536,595,206,745.75 and 215,237,803,471.90

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Solution

The fourth proportional to 388,845,547,911.16, 536,595,206,745.75 and 215,237,803,471.90 is: 297,021,720,510.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,845,547,911.16 : 536,595,206,745.75 = 215,237,803,471.90 : x
  2. Step 2: Convert to fraction form
    388,845,547,911.16/536,595,206,745.75 = 215,237,803,471.90/x
  3. Step 3: Cross multiply
    388,845,547,911.16x = 536,595,206,745.75 × 215,237,803,471.90
  4. Step 4: Simplify right side
    388,845,547,911.16x = 115,495,573,653,505,286,602,752
  5. Step 5: Solve for x
    x = 115,495,573,653,505,286,602,752/388,845,547,911.16
  6. Step 6: Final answer
    x = 297,021,720,510.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.