Home / 390,720,021.60-586,080,032.40-368,424,674.40

Finding the Fourth Proportional to 390,720,021.60, 586,080,032.40 and 368,424,674.40

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Solution

The fourth proportional to 390,720,021.60, 586,080,032.40 and 368,424,674.40 is: 552,637,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,720,021.60 : 586,080,032.40 = 368,424,674.40 : x
  2. Step 2: Convert to fraction form
    390,720,021.60/586,080,032.40 = 368,424,674.40/x
  3. Step 3: Cross multiply
    390,720,021.60x = 586,080,032.40 × 368,424,674.40
  4. Step 4: Simplify right side
    390,720,021.60x = 215,926,345,109,311,424
  5. Step 5: Solve for x
    x = 215,926,345,109,311,424/390,720,021.60
  6. Step 6: Final answer
    x = 552,637,011.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.