Home / 428,875,787.60-643,313,681.40-357,450,117.20

Finding the Fourth Proportional to 428,875,787.60, 643,313,681.40 and 357,450,117.20

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Solution

The fourth proportional to 428,875,787.60, 643,313,681.40 and 357,450,117.20 is: 536,175,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,875,787.60 : 643,313,681.40 = 357,450,117.20 : x
  2. Step 2: Convert to fraction form
    428,875,787.60/643,313,681.40 = 357,450,117.20/x
  3. Step 3: Cross multiply
    428,875,787.60x = 643,313,681.40 × 357,450,117.20
  4. Step 4: Simplify right side
    428,875,787.60x = 229,952,550,812,793,440
  5. Step 5: Solve for x
    x = 229,952,550,812,793,440/428,875,787.60
  6. Step 6: Final answer
    x = 536,175,175.80

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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.