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Finding the Fourth Proportional to 388,746.36, 536,478.69 and 216,681.93

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Solution

The fourth proportional to 388,746.36, 536,478.69 and 216,681.93 is: 299,025.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,746.36 : 536,478.69 = 216,681.93 : x
  2. Step 2: Convert to fraction form
    388,746.36/536,478.69 = 216,681.93/x
  3. Step 3: Cross multiply
    388,746.36x = 536,478.69 × 216,681.93
  4. Step 4: Simplify right side
    388,746.36x = 116,245,237,953.07
  5. Step 5: Solve for x
    x = 116,245,237,953.07/388,746.36
  6. Step 6: Final answer
    x = 299,025.92

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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.