Home / 742,569.86-1,024,570.78-420,279.95

Finding the Fourth Proportional to 742,569.86, 1,024,570.78 and 420,279.95

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Solution

The fourth proportional to 742,569.86, 1,024,570.78 and 420,279.95 is: 579,886.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,569.86 : 1,024,570.78 = 420,279.95 : x
  2. Step 2: Convert to fraction form
    742,569.86/1,024,570.78 = 420,279.95/x
  3. Step 3: Cross multiply
    742,569.86x = 1,024,570.78 × 420,279.95
  4. Step 4: Simplify right side
    742,569.86x = 430,606,557,700.59
  5. Step 5: Solve for x
    x = 430,606,557,700.59/742,569.86
  6. Step 6: Final answer
    x = 579,886.93

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1.5x scale

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.