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Finding the Fourth Proportional to 556,093.47, 767,403.21 and 311,075.05

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Solution

The fourth proportional to 556,093.47, 767,403.21 and 311,075.05 is: 429,280.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,093.47 : 767,403.21 = 311,075.05 : x
  2. Step 2: Convert to fraction form
    556,093.47/767,403.21 = 311,075.05/x
  3. Step 3: Cross multiply
    556,093.47x = 767,403.21 × 311,075.05
  4. Step 4: Simplify right side
    556,093.47x = 238,719,991,920.91
  5. Step 5: Solve for x
    x = 238,719,991,920.91/556,093.47
  6. Step 6: Final answer
    x = 429,280.34

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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.