Home / 513,565,428.25-708,721,664.70-278,616,088.72

Finding the Fourth Proportional to 513,565,428.25, 708,721,664.70 and 278,616,088.72

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Solution

The fourth proportional to 513,565,428.25, 708,721,664.70 and 278,616,088.72 is: 384,490,947.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,565,428.25 : 708,721,664.70 = 278,616,088.72 : x
  2. Step 2: Convert to fraction form
    513,565,428.25/708,721,664.70 = 278,616,088.72/x
  3. Step 3: Cross multiply
    513,565,428.25x = 708,721,664.70 × 278,616,088.72
  4. Step 4: Simplify right side
    513,565,428.25x = 197,461,258,209,841,312
  5. Step 5: Solve for x
    x = 197,461,258,209,841,312/513,565,428.25
  6. Step 6: Final answer
    x = 384,490,947.69

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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.