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Finding the Fourth Proportional to 528,041.40, 790,895.70 and 278,431.80

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Solution

The fourth proportional to 528,041.40, 790,895.70 and 278,431.80 is: 417,032.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,041.40 : 790,895.70 = 278,431.80 : x
  2. Step 2: Convert to fraction form
    528,041.40/790,895.70 = 278,431.80/x
  3. Step 3: Cross multiply
    528,041.40x = 790,895.70 × 278,431.80
  4. Step 4: Simplify right side
    528,041.40x = 220,210,513,363.26
  5. Step 5: Solve for x
    x = 220,210,513,363.26/528,041.40
  6. Step 6: Final answer
    x = 417,032.67

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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.