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Finding the Fourth Proportional to 390,893,715.60, 586,340,573.40 and 299,060,710.80

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Solution

The fourth proportional to 390,893,715.60, 586,340,573.40 and 299,060,710.80 is: 448,591,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,893,715.60 : 586,340,573.40 = 299,060,710.80 : x
  2. Step 2: Convert to fraction form
    390,893,715.60/586,340,573.40 = 299,060,710.80/x
  3. Step 3: Cross multiply
    390,893,715.60x = 586,340,573.40 × 299,060,710.80
  4. Step 4: Simplify right side
    390,893,715.60x = 175,351,428,651,883,584
  5. Step 5: Solve for x
    x = 175,351,428,651,883,584/390,893,715.60
  6. Step 6: Final answer
    x = 448,591,066.20

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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.