Home / 858,420.04-1,287,616.95-290,200.28

Finding the Fourth Proportional to 858,420.04, 1,287,616.95 and 290,200.28

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Solution

The fourth proportional to 858,420.04, 1,287,616.95 and 290,200.28 is: 435,295.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,420.04 : 1,287,616.95 = 290,200.28 : x
  2. Step 2: Convert to fraction form
    858,420.04/1,287,616.95 = 290,200.28/x
  3. Step 3: Cross multiply
    858,420.04x = 1,287,616.95 × 290,200.28
  4. Step 4: Simplify right side
    858,420.04x = 373,666,802,641.79
  5. Step 5: Solve for x
    x = 373,666,802,641.79/858,420.04
  6. Step 6: Final answer
    x = 435,295.99

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1.5x scale

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.