Home / 287,712,946.90-431,569,420.35-285,697,407.70

Finding the Fourth Proportional to 287,712,946.90, 431,569,420.35 and 285,697,407.70

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Solution

The fourth proportional to 287,712,946.90, 431,569,420.35 and 285,697,407.70 is: 428,546,111.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,946.90 : 431,569,420.35 = 285,697,407.70 : x
  2. Step 2: Convert to fraction form
    287,712,946.90/431,569,420.35 = 285,697,407.70/x
  3. Step 3: Cross multiply
    287,712,946.90x = 431,569,420.35 × 285,697,407.70
  4. Step 4: Simplify right side
    287,712,946.90x = 123,298,264,636,586,624
  5. Step 5: Solve for x
    x = 123,298,264,636,586,624/287,712,946.90
  6. Step 6: Final answer
    x = 428,546,111.55

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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.