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Finding the Fourth Proportional to 922,779.60, 1,384,363.80 and 390,026.40

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Solution

The fourth proportional to 922,779.60, 1,384,363.80 and 390,026.40 is: 585,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,779.60 : 1,384,363.80 = 390,026.40 : x
  2. Step 2: Convert to fraction form
    922,779.60/1,384,363.80 = 390,026.40/x
  3. Step 3: Cross multiply
    922,779.60x = 1,384,363.80 × 390,026.40
  4. Step 4: Simplify right side
    922,779.60x = 539,938,429,204.32
  5. Step 5: Solve for x
    x = 539,938,429,204.32/922,779.60
  6. Step 6: Final answer
    x = 585,121.77

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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.